メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.945915632047 43.6296479968751, 141.945807524541 43.6299721784887, 141.945733764927 43.6301709252797, 141.945586433733 43.6305311471657, 141.94532756799 43.6305937756889, 141.943742846721 43.630971949159, 141.943402117818 43.630287024367, 141.943077528394 43.6296186335404, 141.945912841067 43.6289053390036, 141.946017067439 43.6288801282836, 141.946215075446 43.6288322420935, 141.945915632047 43.6296479968751)) ^^http://www.opengis.net/ont/geosparql#wktLiteral